I bought the nano cortex as a back up for my qc and for smaller gigs.
I did my first gig and the sounds were stellar, but I encountered the same problem on a few occasions that was quite scary!!
When pressing the foot switch (I had four sounds set two a side with left being rhythm and lead with a plexi capture and right side the same but with a pitch shift) I must have rotated and so brought up a different patch. So so bad! A quick double press brought things back, but there needs to be a quick fix implemented.
My feature request is to have a performance
Mode to disable the rotary 
